linux-kernel - [PATCH v2 17/17] locks: clean up comments over fl_owner

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Message-Id: <1409834323-7171-18-git-send-email-jlayton@primarydata.com>
Date:	Thu,  4 Sep 2014 08:38:43 -0400
From:	Jeff Layton <jlayton@...marydata.com>
To:	linux-fsdevel@...r.kernel.org
Cc:	linux-nfs@...r.kernel.org, Christoph Hellwig <hch@...radead.org>,
	"J. Bruce Fields" <bfields@...ldses.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 17/17] locks: clean up comments over fl_owner_t definition

The contents of an fl_owner_t have morphed a bit over the years, fix up
the comments to account for the changes.

Signed-off-by: Jeff Layton <jlayton@...marydata.com>
---
 include/linux/fs.h | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index ed4e1897099c..a51be79b7dc3 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -852,11 +852,19 @@ static inline struct file *get_file(struct file *f)
 #define FILE_LOCK_DEFERRED 1
 
 /*
- * The POSIX file lock owner is determined by
- * the "struct files_struct" in the thread group
- * (or NULL for no owner - BSD locks).
+ * A generic "file lock owner" value. This is set differently for different
+ * types of locks.
  *
- * Lockd stuffs a "host" pointer into this.
+ * The POSIX file lock owner is determined by the "struct files_struct" in the
+ * thread group.
+ *
+ * Flock (BSD) locks, OFD locks and leases set the fl_owner to the
+ * file description pointer.
+ *
+ * lockd stuffs a "host" pointer into this
+ *
+ * nfsd stuffs a * nfs4_file pointer into this for leases, and a lockowner
+ * pointer into it for v4 locks.
  */
 typedef void *fl_owner_t;
 
-- 
1.9.3

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